This is after Stream mapping:

Stream mapping:
Stream #0:0 (libdav1d) -> haldclut
Stream #0:2 (mjpeg) -> haldclut
haldclut:default -> Stream #0:0 (libx264)
Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
[Parsed_haldclut_0 @ 00000169ed8e5e40] Padding on the right (280px) of the Hald CLUT will be ignored
[Parsed_haldclut_0 @ 00000169ed8e5e40] The Hald CLUT width does not match the level
[Parsed_haldclut_0 @ 00000169ed8e5e40] Failed to configure input pad on Parsed_haldclut_0
[fc#0 @ 00000169ed0d7b80] Error reinitializing filters!
[fc#0 @ 00000169ed0d7b80] Task finished with error code: -1094995529 (Invalid data found when processing input)
[fc#0 @ 00000169ed0d7b80] Terminating thread with return code -1094995529 (Invalid data found when processing input)
[vost#0:0/libx264 @ 00000169ed155300] [enc:libx264 @ 00000169ed097540] Could not open encoder before EOF
[vost#0:0/libx264 @ 00000169ed155300] Task finished with error code: -22 (Invalid argument)
[vost#0:0/libx264 @ 00000169ed155300] Terminating thread with return code -22 (Invalid argument)
[out#0/mp4 @ 00000169ed5c8180] Nothing was written into output file, because at least one of its streams received no packets.

by default it uses 8-bit precision which results in banding.

you would need to jump through some hoops to get it done.

ffmpeg -f lavfi -i haldclutsrc=12 -pix_fmt rgb48le …

and

-f lavfi -i haldclutsrc=12
-filter_complex “[0:v]format=rgb48le[vid];
[1:v]format=rgb48le[lut];
[vid][lut]haldclut,
format=yuv420p”

Thank you so much!!

You can try to create a vertical version of it too:
ffmpeg -f lavfi -i haldclutsrc=8 \
-i input.mp4 -ss 0:00:04 -frames:v 1 \
-filter_complex "[1]scale=512:-1[b];[0][b]vstack" \
haldclut_correction_vertical.png
Or try to create an image containing only the CLUT:
ffmpeg -f lavfi -i haldclutsrc=8 -frames:v 1 haldclut_correction_simple.png
Ffmpeg should use the top-left corner of the picture you supply, as long as the shorter side is 512 and this picture (or the modified version of it) is there it should work.

If it still doesn’t work, could you post the output of ffmpeg (the part starting from the “Stream mapping:” line until the end should be enough) and the picture you try to supply as a CLUT?

Thanks

Thanks

First of all, sorry for the very late reply…

The module I used gives only a logic high or low value, depending on the signal the antenna receives. I think in your case there is some noise which makes the read of the logic level unreliable – for the same reason I used some basic noise filtering: sampling the value from the module a number of times (200 in my case) and then assuming the signal was high if the majority (75% = 150 samples) of it were high, otherwise low. See Line 143 of my code and the Noise section of this post for more details.

And regarding the other station – I don’t think that anyone else is allowed to broadcast on this exact frequency as this station is used all around Europe.

I’m almost certain that you have finished your project a long time ago, but I wanted to reply in any case.

Gabor

Örülök, hogy hasznos volt! Sok sikert a hőmérős projektedhez! :)

Üdv:
Gábor

Köszi a jól összefoglalt leírást! Épp most küzdök egy ilyen külső hőmérővel; nagy segítség volt így egyben olvasni!

Üdv, Gábor